mobile-android/app/src/main/res/layout/fragment_personal_details.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/root"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:fillViewport="true">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/keyline_1"
        android:paddingStart="@dimen/keyline_5"
        android:paddingEnd="@dimen/keyline_5"
        android:paddingBottom="@dimen/keyline_9">

        <TextView
            android:id="@+id/personal_details_headline"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/personal_details_headline"
            android:textAlignment="viewStart"
            android:textAppearance="?textAppearanceHeadline2"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/personal_details_name_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/keyline_4"
            android:importantForAccessibility="no"
            android:text="@string/personal_details_name_title"
            android:textAlignment="viewStart"
            android:textAppearance="?textAppearanceBody1"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/personal_details_headline" />

        <EditText
            android:id="@+id/personal_details_name"
            android:layout_width="0dp"
            android:layout_height="@dimen/text_field_height"
            android:layout_marginTop="@dimen/keyline_1"
            android:background="@drawable/edittext_modified_states"
            android:contentDescription="@string/personal_details_name_content_description"
            android:inputType="textPersonName"
            android:maxLines="1"
            android:paddingStart="@dimen/keyline_1"
            android:paddingEnd="@dimen/keyline_1"
            android:singleLine="true"
            android:textAlignment="viewStart"
            android:textColor="@color/slack_black"
            android:textColorHighlight="@color/dark_cerulean_3"
            android:textCursorDrawable="@null"
            android:textSize="@dimen/text_body_small"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/personal_details_name_title"
            tools:text="John Smith" />

        <TextView
            android:id="@+id/personal_details_name_error"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/keyline_1"
            android:text="@string/personal_details_name_characters_prompt"
            android:textAlignment="viewStart"
            android:textColor="@color/error"
            android:visibility="gone"
            app:layout_constraintStart_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/personal_details_name"
            tools:visibility="visible" />

        <androidx.constraintlayout.widget.Barrier
            android:id="@+id/personal_details_name_barrier"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:barrierDirection="bottom"
            app:constraint_referenced_ids="personal_details_name,personal_details_name_error" />

        <TextView
            android:id="@+id/personal_details_age_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/keyline_4"
            android:importantForAccessibility="no"
            android:text="@string/personal_details_age_title"
            android:textAlignment="viewStart"
            android:textAppearance="?textAppearanceBody1"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/personal_details_name_barrier" />

        <au.gov.health.covidsafe.ui.onboarding.fragment.personal.SelectionCallbackSpinner
            android:id="@+id/personal_details_age"
            android:layout_width="0dp"
            android:layout_height="@dimen/text_field_height"
            android:layout_marginTop="@dimen/keyline_1"
            android:background="@drawable/edit_text_black_background"
            android:contentDescription="@string/personal_details_age_content_description"
            android:gravity="center_vertical|start"
            android:paddingStart="@dimen/keyline_1"
            android:paddingEnd="@dimen/keyline_1"
            android:textAlignment="viewStart"
            android:textColor="@color/slack_black"
            android:textColorHighlight="@color/dark_cerulean_3"
            android:textCursorDrawable="@null"
            android:textSize="@dimen/text_body_small"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/personal_details_age_title" />

        <TextView
            android:id="@+id/personal_details_age_error"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/keyline_1"
            android:text="@string/personal_details_age_error_prompt"
            android:textAlignment="viewStart"
            android:textColor="@color/error"
            android:visibility="gone"
            app:layout_constraintStart_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/personal_details_age"
            tools:visibility="visible" />

        <androidx.constraintlayout.widget.Barrier
            android:id="@+id/personal_details_age_barrier"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:barrierDirection="bottom"
            app:constraint_referenced_ids="personal_details_age,personal_details_age_error" />

        <TextView
            android:id="@+id/personal_details_post_code_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/keyline_4"
            android:importantForAccessibility="no"
            android:text="@string/personal_details_post_code"
            android:textAlignment="viewStart"
            android:textAppearance="?textAppearanceBody1"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/personal_details_age_barrier" />

        <EditText
            android:id="@+id/personal_details_post_code"
            android:layout_width="0dp"
            android:layout_height="@dimen/text_field_height"
            android:layout_marginTop="@dimen/keyline_1"
            android:background="@drawable/edittext_modified_states"
            android:contentDescription="@string/personal_details_post_code_content_description"
            android:digits="0123456789"
            android:gravity="center_vertical|start"
            android:imeOptions="actionDone"
            android:inputType="number"
            android:maxLength="4"
            android:paddingStart="@dimen/keyline_1"
            android:paddingEnd="@dimen/keyline_1"
            android:textDirection="locale"
            android:textAlignment="viewStart"
            android:textColor="@color/slack_black"
            android:textColorHighlight="@color/dark_cerulean_3"
            android:textCursorDrawable="@null"
            android:textSize="@dimen/text_body_small"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/personal_details_post_code_title"
            tools:text="John Smith" />

        <TextView
            android:id="@+id/personal_details_post_code_error"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/keyline_1"
            android:text="@string/personal_details_post_code_error_prompt"
            android:textColor="@color/error"
            android:visibility="gone"
            app:layout_constraintStart_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/personal_details_post_code"
            tools:visibility="visible" />

        <androidx.constraintlayout.widget.Barrier
            android:id="@+id/personal_details_barrier"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:barrierDirection="bottom"
            app:constraint_referenced_ids="personal_details_post_code,personal_details_post_code_error" />

    </androidx.constraintlayout.widget.ConstraintLayout>

</ScrollView>